Fault Identification for Systems Described by Nonlinear Models Using Sliding Mode Observers

The paper studies the fault identification problem for nonlinear control systems under the unmatched disturbances. To address the problem, sliding mode observers are used. The suggested approach for constructing sliding mode observer is based on the reduced order model of the initial system. This allows to reduce complexity of sliding mode observer and relax the limitations imposed on the initial system, therefore a class of systems for which sliding mode observers can be constructed is extended.